BackgroundADHD is one of the most prevalent mental health disorders among children and adolescents. Household socio-economic status (SES) in early childhood is inversely related to ADHD later in childhood or adolescence. We conducted a systematic review to examine psychological. social and behavioural factors that mediate these relationships (PROSPERO Registration number: CRD420201828... https://vesaers.shop/product-category/dla-dzieci/